Friday

May 27, 2016
Total # Posts: 87

**Science**

determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^-4 M HI pH 8.65*10^-8 M KOH pH 0.00212M Ca(OH)2 pH
*March 26, 2016*

**Science**

Is the 1st one -Log(0.0812)= 1.09?
*March 26, 2016*

**Science**

determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^-4 M HI pH 8.65*10^-8 M KOH pH 0.00212M Ca(OH)2 pH
*March 26, 2016*

**math**

if a 3-foot -tall child casts a shadow that is 2 feet long, how tall is a telephone pole that casts a shadow that is 40 feet long?
*March 26, 2015*

**math**

5 and 12
*September 4, 2014*

**chemistry**

Kc for the decomposition of ammonium hydrogen sulfide is 1.8 x 10-4 at 15oC. a. When 5.00 grams of the pure salt decomposes in a sealed 3.0 L flask at 15oC, what are the equilibrium concentrations of NH3 and H2S? b. What are the equilibrium concentrations of the products at ...
*May 1, 2014*

**Math**

how do I explain how to solve the following problem 2 X 10 square + 3 X 10 to the first + 5 X 10 to the zero +7 X 10 to the negative one
*December 7, 2012*

**Science**

80.56 N
*September 29, 2012*

**pre-calc**

find all values of 2sin theta-3csc theta=-5
*April 3, 2012*

**Math**

If I missed 24 problems out of 40, what is my grade?
*April 3, 2012*

**math**

If 37 out of 41 people get something right. What percent is that and how do you get the answer? Thank you.
*March 8, 2012*

**science**

light wave can move through what
*February 21, 2012*

**math**

Which division sentence is related to the given set of subtraction sentences? 36-9=27 27-9=18 18-9=9 9-9=0 Answer choices 36 divided by 9 = 4 36 divided by 18 = 2 18 divided by 9 = 2 36 divided by 12 = 3
*January 11, 2012*

**Algebra**

Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1 y^5 z^5)^-1 Thank you for any help you can give me-I'm so stuck for my homeworkk tonight. I know I can bring up the negatives to top and negative to bottom to make them positive but besides that-I ...
*November 14, 2011*

**Algebra**

Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1 y^5 z^5)^-1 Thank you for any help you can give me-I'm so stuck for my homeowrk tonight. I know I can bring up the negatives to top and negative to bottom to make them positive but besides that-I don...
*November 14, 2011*

**English-Please help!**

I have a question and would appreciate any input or advice We just finished reading The Catcher in the Rye" and I'm stuck on a question for homework; Holden's anger over Stadlater dationg Jane, who symbolically guards her kings in a game of checkers shows his ...
*October 29, 2011*

**English**

I have a question and would appreciate any input or advice We just finished reading The Catcher in the Rye" and I'm stuck on a question for homework; Holden's anger over Stadlater dationg Jane, who symbolically guards her kings in a game of checkers shows his ...
*October 29, 2011*

**punctuation**

Please show me the correct way to punctuate the following or did I do it correctly: You can't pull my strings. I'm breaking away starting today.
*October 26, 2011*

**English/writing**

If I am writing the following as a poem, how would I punctuate it- would each letter at the beginning be a captial, would it have commas or a period. We are room 204 Check out our door It is clear to see We choose to be drug free
*October 20, 2011*

**English/writing**

But would you put commas, periods or anything like that in it. Would every sentence begin with a capital?
*October 20, 2011*

**English/writing**

If I am writing the following as a poem, how would I punctuate it- We are room 204 Check out our door It is clear to see We choose to be drug free
*October 20, 2011*

**geometry**

A transformation T : (x, y) (x + 3, y + 1). The preimage of the point (4, 3) is
*July 18, 2011*

**math**

A transformation T: (x, y) (x + 3, y + 1). For the ordered pair (4, 3), enter its preimage point.
*July 17, 2011*

**STATS**

a woman standing on a bridge overlooking a major insterstate wants to know how likely it is that the next 20 out of 50 cars that pass under the bridge are red cars, if she has observed in the past that the probability than any given car on that interstate highway is red is ...
*May 25, 2011*

**child care**

The most common underlying feature associated with reading disorders is? A Associated new words with those in memory. B.visually processing the shapes of letters. c.interpreting the meaning of words d.distingushing or seperating sounds in spoken words i think d
*May 5, 2011*

**math**

how would you solve a problem where someone drinks 4 to 7 sodas per week. What is a reasonable number of sodas they will drink in 8 weeks?
*April 25, 2011*

**PHYSICS**

In the Bohr model of the hydrogen atom, the electron makes 6.00×10^15 rev/sec around the nucleus.What is the average current at a point on the orbit of the electron?
*April 11, 2011*

**Math**

Please share a strategy with me. I also added answer choices to the first problem. What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a bag of 20 ...
*March 14, 2011*

**Math**

What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a bag of 20 apples? Terry's party started at 6:30 p.m. and ended at 9:00 p.m. What was the ...
*March 14, 2011*

**math**

How do you cross multiply to find out the following: 3/5=2/4 3/5>2/4 3/5<2/4
*March 11, 2011*

**CHEMISTRY**

Consider the reaction shown below. 4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol PH3 is consumed in a 1.9-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
*February 27, 2011*

**Calculus**

find (d^2y)/(dx^2) if 5x^2-8y^2=8
*February 16, 2011*

**physics**

Within the nucleus. What strength of electric field does a proton produce at the distance of another proton, about 4.00×10−15m away? ___N/c
*February 15, 2011*

**Chemistry**

How many grams of NiSO4*6H2O are needed to prepare 200*10^2 mL of a 3.5*10^-2 M NiSO4 solution?
*February 15, 2011*

**Chemistry**

Can visible light cause excitation of an electron in water? explain
*February 15, 2011*

**math/ CIRCUMFERENCE of a circle**

880
*January 24, 2011*

**physics**

Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.
*November 30, 2010*

**Physics**

Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.
*November 30, 2010*

**Chemistry**

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion ...
*November 18, 2010*

**chemistry**

A piece of solid carbon dioxide, with a mass of 7.4 g, is placed in a 4.0-L otherwise empty container at 27°C. (a) What is the pressure in the container after all the carbon dioxide vaporizes? 1.0atm (b) If 7.4 g solid carbon dioxide were placed in the same container but ...
*November 1, 2010*

**chemistry**

Calculate the pressure in the flask in torr, atmosphere, and pascals if ha = 114 mm.
*October 31, 2010*

**chemistry**

A 14.5-L tank is filled with H2 to a pressure of 2.00 102 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.
*October 31, 2010*

**chemistry**

The rate of effusion of a particular gas was measured and found to be 25.0 mL/min. Under the same conditions, the rate of effusion of pure methane (CH4) gas is 46.4 mL/min. What is the molar mass of the unknown gas?
*October 31, 2010*

**PHYSICS**

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
*October 29, 2010*

**Chemistry**

A 14.5-L tank is filled with H2 to a pressure of 2.00 102 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.
*October 28, 2010*

**Chemistry**

Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 76°C at 747 torr.
*October 27, 2010*

**Chemistry**

What volume of each of the following bases will react completely with 24.00 mL of 0.350 M HCl? 0.100 M NaOH 0.0500 M Ba(OH)2 0.250 M KOH
*October 19, 2010*

**Chemistry**

When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 9.0 M HCl is required to react completely with 5.00 g of magnesium?
*October 19, 2010*

**PHYSICS**

A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/s The time required for the football to reach the highest point in its trajectory is 1.53s. It gets 11.5m above the ground. How much time after it is thrown...
*October 17, 2010*

**Physics**

A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 300 m. You can ignore air resistance. How much time is required for the bomb to reach the earth? 7.82s How ...
*October 17, 2010*

**Physics**

A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/s The time required for the football to reach the highest point in its trajectory is 1.53s. It gets 11.5m above the ground. How much time after it is thrown...
*October 17, 2010*

**physics**

A train slows down as it rounds a sharp horizontal turn, slowing from 87.4 km/h to 44.6 km/h in the 16.1 s that it takes to round the bend. The radius of the curve is 180 m. Compute the acceleration at the moment the train speed reaches 44.6 km/h. Assume that it continues to ...
*September 9, 2010*

**physics**

A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.70 m/s. (a) What is her average speed over the entire trip?
*August 31, 2010*

**physics**

A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.70 m/s. (a) What is her average speed over the entire trip?
*August 31, 2010*

**geometry**

solve the equation 3^2x + 2.3^x - 15 = 0
*July 11, 2010*

**all**

What does it mean when a school has a web based curriculum?
*May 4, 2010*

**math**

Please help with all of these: 3 out of 32 10 out of 30 20 out of 29 3 out of 35 9 out of 34 24 out of 33 17 out of 19
*February 19, 2010*

**math **

so is 9 out of 34 26.4%
*February 19, 2010*

**MATH**

what percent is 3 out of 35 what percent is 9 out of 34 what percent is 24 out of 33
*February 19, 2010*

**math**

What are the following percents: 7 out of 53 17 out of 52 4 out of 18 7 out of 18 3 out of 33 9 out of 31 3 out of 35 7 out of 32
*February 14, 2010*

**math**

how do I figure out the following:52 students take a test and only 3 pass the test what percent of the students passed I need a strategy/show how you got the answer thanks
*February 8, 2010*

**math**

I am doing 4th grade number sense are there any cool math tricks or short cuts that would be good for me to know.
*September 28, 2009*

**math**

got it now
*September 23, 2009*

**math**

I think I must be asking my question wrong, but what is my number grade if I missed 36 out of 85 questions. For example if I missed 1 out of 10 I know my grade would be a 90.
*September 23, 2009*

**math**

If I have 85 questions on a test, but I only got 36 correct-what is my grade?
*September 23, 2009*

**math**

How do I figure a percent question for example what is 7 out of 50?
*May 28, 2009*

**com140**

resume and job letter
*February 20, 2009*

**math**

what percent is 23 of 51
*October 30, 2008*

**math**

My brother George needs help with a math question. What percent is 23 students of 51 students?
*October 30, 2008*

**math**

How can I add a two digit number and two three digit numbers in my head. Any tricks anyone knows in connection with short-cuts to solving different math problems( such as addition, subtraction,multiplication, division, rounding, conversions, percents) in your head when you can...
*September 27, 2008*

**math**

How can I solve a 27 X 18 in my head without pencil and paper.
*September 27, 2008*

**math**

how can I solve in my head which digit represents the hundreds place in 3250.136
*September 27, 2008*

**math**

How to solve in my head without using paper for uil number sense How about an addition problem for example 33 + 23.
*September 27, 2008*

**math**

In UIL number sense can someone tell me how to quickly solve the following type problem in my head. I know how to do it on paper, but paper is not allowed in number sense. 79-26
*September 27, 2008*

**math**

Rounding help please! How do I get a child to understand that when rounding to the nearest 100 for example 543 the child doesn't understand that number is between 500 and 600 and not 100 and 200 or something like that. Thanks any help would be appreciated.
*September 27, 2008*

**math**

Looking for a way to explain rounding to a third grader. The child gets the 0-4 round down and 5-9 round up, but for example 549 rounded to the nearest 100 I can't get that the number is between 500 and 600. Any suggestions would be appreciated.
*September 27, 2008*

**Math**

I have another question-Mr. Burns ran 14 miles last week. He only ran on Monday, Tuesday, and Wednesday. If Mr. Burns ran 3 miles on Tuesday and 5 miles on Wednesday, then how many miles did he run on Monday? Could you explain how to get the answer please.
*September 18, 2008*

**Math**

Earl answered 2 more math questions correctly than Anna did. Anna answered 3 fewer questions thatn Juanita did. Juanita answered 21 questions correctly. How many questions did Earl answer correctly? Could someone explain how to get the answer. Thanks.
*September 18, 2008*

**keyboarding**

Which one of the following represents the correct format for the salutation of a letter that uses open punctuation? A. Dear Mr. Joseph Rodrigues, B. Mr. Joseph Rodrigues: C. Dear Mr. Rodrigues: D. Dear Mr. Rodrigues
*May 21, 2008*

**keyboarding**

Secretary A will use "Sincerely" as the complimentary closing of a letter to a colleague. Secretary B will use "Cordially" as the complimentary closing of a letter to a friend. Which secretary is using the correct closing? A. Neither secretary B. Both ...
*May 21, 2008*

**keyboarding**

When creating a 20-page newsletter in which you want different margin settings and other page formats within the multipage document, which one of the following Word features should you use? A. Styles B. Formatting C. Unequal columns D. Sections
*May 21, 2008*

**keyboarding**

12. What word processing feature protects against printing the last line of a paragraph at the top of the next page? A. Hard Page Break B. Merge Cells C. Widow/Orphan Control D. Wordwrap
*May 21, 2008*

**keyboarding and word processing**

11. Carter must inform employees at Benton Industries of the details of the company's annual summer picnic. The best document format for him to use to announce this one event is a/an A. block letter. B. brochure. C. memorandum. D. short report.
*May 21, 2008*

**keyboarding and word processing**

do anyone have the correct answer to exam 986131 for pennfoster key boarding and word processing.
*May 19, 2008*

**nonfiction**

matthias is a example of
*May 1, 2008*

**science**

Which properties are most useful to identify a mineral? Explain
*February 21, 2008*

**earth**

How does time affect crystals?
*February 21, 2008*

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